{{ if ne .Params.showAppearanceSwitcher nil }}
  {{ warnf "[CONGO] Theme parameter `showAppearanceSwitcher` has been renamed to `footer.showAppearanceSwitcher`. Please update your site configuration." }}
{{ end }}
{{ if ne .Params.showScrollToTop nil }}
  {{ warnf "[CONGO] Theme parameter `showScrollToTop` has been renamed to `footer.showScrollToTop`. Please update your site configuration." }}
{{ end }}
{{ if ne .Params.logo nil }}
  {{ warnf "[CONGO] Theme parameter `logo` has been renamed to `header.logo`. Please update your site configuration." }}
{{ end }}
{{ if .Author }}
  {{ warnf "[CONGO] Theme parameter `author` block in `languages.xx.toml` has been renamed to `params.author`. Please update your site configuration." }}
{{ end }}